Bugs fixed:
  now in subscriber and publisher, normal message and initializing
  message are using the same connection, which was a pitfall.
Added some comments
modified:   quotePub/QuotePublisher.java
modified:   quotePub/QuotePublisherA.java
modified:   quoteSubMsgSelector/MsgSelector.java
modified:   quoteSubMsgSelector/QuoteSubMsgSelector.java
modified:   quoteSubscriber/QuoteSubscriberB.java